I made this account to ask this very question.
I don't want a smart watches per se but I want to have Bluetooth connectivity for music control and a few select notifications and not have to worry about battery life. Closet thing I've found is a casio Bluetooth watch with a battery life of 2yrs (Bluetooth used 12hrs/day)
My question, is that the longest battery life around for limited smartness?
Can't wait for the day that real smart Watches have that long of a battery life.
Dec 16, 2015, 5:52:20 PM via Website
Dec 16, 2015 5:52:20 PM via Website
Don't worry, like smart phone the smart watch will also become a trend and in few years they will make it.
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I agree with you, man. I want at least 20 hours
no need of worry, I am using it and it has good battery backup..
Just the thing I was looking for 
I knew a sports wristband's stand by time is 15days.